public class WeiXin implements ChatTool {
  void shake(){
      System.out.println("WeiXin摇一摇");
  }
    @Override
    public void login() {
        System.out.println("WeiXin登录");
    }

    @Override
    public void send() {
shake();
        System.out.println("WeiXin发消息");
    }

    @Override
    public void exit() {
        System.out.println("WeiXin退出");
    }
}
